JPS54147755A - Variable equalizer - Google Patents

Variable equalizer

Info

Publication number
JPS54147755A
JPS54147755A JP5555878A JP5555878A JPS54147755A JP S54147755 A JPS54147755 A JP S54147755A JP 5555878 A JP5555878 A JP 5555878A JP 5555878 A JP5555878 A JP 5555878A JP S54147755 A JPS54147755 A JP S54147755A
Authority
JP
Japan
Prior art keywords
circuit
variable
addition
circuits
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5555878A
Other languages
Japanese (ja)
Other versions
JPS6117366B2 (en
Inventor
Yoshitaka Takasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5555878A priority Critical patent/JPS54147755A/en
Priority to US06/036,973 priority patent/US4262263A/en
Publication of JPS54147755A publication Critical patent/JPS54147755A/en
Publication of JPS6117366B2 publication Critical patent/JPS6117366B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
    • H04B3/145—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers variable equalisers

Abstract

PURPOSE: To establish the variable equalizer simple in circuit constitution and great in speed, by constituting the equalizer with the first plurality circuit having the same variable performance in cascade connection, coefficient circuit, second plurality circuit having frequency characteristics and addition circuit.
CONSTITUTION: The variable circuits 3-1,...3-n having the same variable characteristics and independently of frequency are connected at the input terminal 1. The coefficient addition circuits 4-1,...4-n which take the input and output signal of this circuit and add the coefficients a0...an are connected. The coefficient addition circuit consists of the impedance circuit depending on the resistance and frequency. Those outputs are inputted to the adders 5 and they are outputted from the output terminal 2 with addition. When the variable value of this circuit is taken x, the transfer function is expressed as equation (1), and it is operated without increase in error and causing oscillation to the signal in high speed. Further, since the circuits 3-1...3-n are constituted in the same circuit, design and manufacture are made easy and the cost can be reduced.
COPYRIGHT: (C)1979,JPO&Japio
JP5555878A 1978-05-12 1978-05-12 Variable equalizer Granted JPS54147755A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5555878A JPS54147755A (en) 1978-05-12 1978-05-12 Variable equalizer
US06/036,973 US4262263A (en) 1978-05-12 1979-05-08 Variable equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5555878A JPS54147755A (en) 1978-05-12 1978-05-12 Variable equalizer

Publications (2)

Publication Number Publication Date
JPS54147755A true JPS54147755A (en) 1979-11-19
JPS6117366B2 JPS6117366B2 (en) 1986-05-07

Family

ID=13002023

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5555878A Granted JPS54147755A (en) 1978-05-12 1978-05-12 Variable equalizer

Country Status (2)

Country Link
US (1) US4262263A (en)
JP (1) JPS54147755A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007202393A (en) * 2006-01-26 2007-08-09 Yen-Tang Hsu A kind of spectrum for analyzing system circuit stabilization

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62187959U (en) * 1986-05-22 1987-11-30
JP2723228B2 (en) * 1987-07-16 1998-03-09 株式会社東芝 Variable gain amplifier circuit
JP2830087B2 (en) * 1989-06-30 1998-12-02 ソニー株式会社 Frequency characteristic correction circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1515335A (en) * 1974-06-21 1978-06-21 Hitachi Ltd Equalizer having variable attenuation
JPS5947489B2 (en) * 1975-11-07 1984-11-19 株式会社日立製作所 Kahentou oyster

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007202393A (en) * 2006-01-26 2007-08-09 Yen-Tang Hsu A kind of spectrum for analyzing system circuit stabilization

Also Published As

Publication number Publication date
JPS6117366B2 (en) 1986-05-07
US4262263A (en) 1981-04-14

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